Invert colors

Hello!
Is there any way to invert the colors of an app without changing the colors manually?

With a mesh, you could use a shader. With sprites, you should probably put them in a mesh and use a shader. Using the fill function, do something like:
fill(255-r, 255-g, 255-b)

See https://codea.io/talk/discussion/4989/blendmodes , search for invert